WO2023181775A1 - Construction machine - Google Patents
Construction machine Download PDFInfo
- Publication number
- WO2023181775A1 WO2023181775A1 PCT/JP2023/006607 JP2023006607W WO2023181775A1 WO 2023181775 A1 WO2023181775 A1 WO 2023181775A1 JP 2023006607 W JP2023006607 W JP 2023006607W WO 2023181775 A1 WO2023181775 A1 WO 2023181775A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- seat
- prime mover
- driver
- mover cover
- cover
- Prior art date
Links
- 238000010276 construction Methods 0.000 title claims description 17
- 238000003780 insertion Methods 0.000 abstract description 14
- 230000037431 insertion Effects 0.000 abstract description 14
- 239000004519 grease Substances 0.000 description 25
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000002452 interceptive effect Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 244000309466 calf Species 0.000 description 2
- 210000001015 abdomen Anatomy 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- 230000037237 body shape Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/16—Cabins, platforms, or the like, for drivers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
- B62D25/08—Front or rear portions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
- B62D25/08—Front or rear portions
- B62D25/10—Bonnets or lids, e.g. for trucks, tractors, busses, work vehicles
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2200/00—Type of vehicle
- B60Y2200/40—Special vehicles
- B60Y2200/41—Construction vehicles, e.g. graders, excavators
- B60Y2200/412—Excavators
Definitions
- the present invention relates to a construction machine in which a driver's seat is provided above a prime mover cover that covers a prime mover.
- a hydraulic excavator as a construction machine consists of a lower traveling body that is capable of self-propulsion, an upper rotating body that is rotatably provided on the lower traveling body, and a working device that is rotatably installed in front of the upper rotating body. , is composed of.
- ultra-compact hydraulic excavators called mini excavators have a small space for installing equipment in the upper revolving structure.
- the upper revolving body of an ultra-compact hydraulic excavator consists of a revolving frame that serves as a support structure, a prime mover such as an engine installed on the rear side of the revolving frame, a prime mover cover that covers the prime mover so that it can be opened and closed, and a rotary cover that covers the prime mover cover on the upper side of the prime mover cover. and a driver's seat where an operator sits (Patent Document 1).
- the prime mover cover is formed of, for example, a thin steel plate in order to facilitate opening and closing operations and reduce costs.
- the driver's seat is mounted on the prime mover cover using, for example, a plurality of bolts.
- the hydraulic excavator of Patent Document 1 has a configuration in which the driver's seat is attached onto the prime mover cover using a plurality of bolts.
- a load is applied to the portion of the prime mover cover to which the driver's seat is attached due to the weight of the driver's seat or the operator sitting in the driver's seat.
- the bolts for attaching the driver's seat to the prime mover cover are concentrated around the driver's seat based on the shape specifications of the driver's seat so that screw tightening tools such as spanners can reach the bolts. For this reason, there is a problem in that the load is concentrated on a part of the prime mover cover, and the prime mover cover is easily deformed.
- the present invention was made in view of the problems of the prior art described above, and an object of the present invention is to prevent the load from being concentrated on a part of the prime mover cover and to suppress deformation of the prime mover cover.
- Our goal is to provide construction machinery with improved quality.
- the present invention includes a self-propelled lower traveling body, and an upper rotating body rotatably provided on the lower traveling body, and the upper rotating body includes a rotating frame forming a support structure, and a rotating upper rotating body.
- a construction machine comprising: a prime mover provided on the rear side of a frame; a prime mover cover that covers the prime mover in an openable/closable manner; and a driver's seat provided above the prime mover cover.
- a seat base is provided between the driver's seat and the driver's seat and fixes the driver's seat above the prime mover cover, and the seat base includes a driver's seat fixing part attached to the driver's seat and a prime mover attached to the prime mover cover. and a cover fixing part, and the motor cover fixing part of the seat base is arranged over a wider area than the driver's seat fixing part.
- the present invention it is possible to prevent load from being concentrated on a part of the prime mover cover, and it is possible to suppress deformation of the prime mover cover.
- FIG. 1 is a perspective view of a hydraulic excavator according to an embodiment of the present invention.
- FIG. 3 is a perspective view showing the hydraulic excavator with the prime mover cover open.
- FIG. 2 is a right side view showing a hydraulic excavator with a working device and a roll bar omitted.
- FIG. 4 is a right side view similar to FIG. 3 showing the hydraulic excavator with the driver's seat in the frontmost position.
- FIG. 4 is a right side view similar to FIG. 3 showing the hydraulic excavator with the driver's seat in the rearmost position.
- FIG. 2 is a perspective view showing a hydraulic excavator with a seat belt, a grease gun, and a cup holder attached to the seat base.
- FIG. 4 is a sectional view of the hydraulic excavator seen from the direction of arrow VII-VII in FIG. 3.
- FIG. 3 is a perspective view showing the rear part of the upper revolving body with the prime mover cover open.
- FIG. 3 is a perspective view showing the prime mover cover and the seat base in an exploded state.
- FIG. 3 is a perspective view of the seat base.
- FIG. 3 is a plan view of the seat base.
- FIG. 3 is a front view of the seat base.
- FIGS. 1 to 12 taking as an example the case where it is applied to a hydraulic excavator.
- a hydraulic excavator 1 includes a crawler-type lower body 2 that is capable of self-propulsion, an upper rotating body 3 that is rotatably mounted on the lower body 2, and a front side of the upper rotating body 3. It is comprised of a swing-type working device 4 that can rotate and swing.
- the hydraulic excavator 1 according to the embodiment is an ultra-mini excavator with a machine weight (total weight) of about 1 ton, which can be used for demolition work inside a building and excavation work in narrow places such as alleys. This is the model called.
- the upper revolving body 3 includes a revolving frame 5, an engine 7, a prime mover cover 9, a driver's seat 10, a seat base 11, seat belts 19, 20, a grease gun 21, and a cup holder 22.
- the rotating frame 5 includes a bottom plate 5A made of a thick rectangular metal plate extending in the front-rear direction, a support portion 5B provided at the front of the bottom plate 5A so as to protrude forward, and a support portion 5B provided at the rear of the bottom plate 5A in the left-right direction. It is configured to include a counterweight 5C extending upwardly.
- the support portion 5B supports the working device 4 so as to be swingable in the left-right direction.
- the counterweight 5C is formed as a heavy object to balance the weight with the working device 4.
- a connecting member 9F of a motor cover 9, which will be described later, is attached to the upper surface of the counterweight 5C.
- the prime mover cover 9 can be supported in an openable and closable (rotatable) manner on the upper part of the counterweight 5C via the connecting member 9F.
- a roll bar 27, which will be described later, is attached to the rear side of the swing frame 5 (counterweight 5C).
- the side cover 6 is provided so as to surround the bottom plate 5A of the rotating frame 5.
- the side cover 6 is erected to have the same height as the counterweight 5C. Further, the side cover 6 is formed by being bent into a U-shape so that the rear side is open.
- the engine 7 constitutes a prime mover and is provided on the rear side of the swing frame 5.
- the engine 7 is located in front of the counterweight 5C and is disposed horizontally extending in the left-right direction.
- the engine 7 drives a hydraulic pump 8 (see FIG. 8).
- a hybrid type prime mover consisting of an engine and an electric motor, or an electric motor can also be used.
- the prime mover cover 9 covers the engine 7 in an openable and closable manner.
- the prime mover cover 9 is formed as an openable/closable cover whose front side can be opened and closed in the vertical direction with the rear side as a fulcrum.
- the prime mover cover 9 is formed into a box shape with a front side 9A, a rear side 9B, a left side 9C, a right side 9D, and a top side 9E with an open bottom.
- the lower portion of the front surface portion 9A is a front surface 9A1 extending in the vertical direction at the forefront of the motor cover 9.
- the upper surface portion 9E of the prime mover cover 9 is formed to be gently curved and downwardly toward the front.
- a connecting member 9F that serves as a fulcrum when opening and closing is provided at the lower part of the rear surface portion 9B.
- the motor cover 9 is rotatably attached to the counterweight 5C via this connecting member 9F.
- the front part 9A is provided with an opening/closing lever 9G. By operating the opening/closing lever 9G, the prime mover cover 9 can be unlocked from the structure on the swing frame 5 side and opened (rotated upward).
- a bracket 9H is erected at the front portion of the upper surface portion 9E and extends in the left-right direction.
- the bracket 9H is provided with a plurality of screw holes 9J, for example, two screw holes, spaced apart from each other in the left-right direction.
- a plurality of screw holes 9K for example, four screw holes, are provided at the rear portion of the upper surface portion 9E at intervals in the left-right direction.
- a bolt 13 for attaching the front portion of the seat base 11 is screwed into the front screw hole 9J.
- a bolt 13 for attaching the rear part of the seat base 11 is screwed into the rear screw hole 9K.
- the six screw holes 9J and 9K provided in the upper surface portion 9E are arranged in a wide range of the upper surface portion 9E. Further, the six screw holes 9J and 9K are connected by the seat base 11 when the seat base 11 is attached using the bolts 13. Therefore, even if a load acts on one screw hole 9J or 9K, this load can be distributed to the other five screw holes 9J and 9K. As a result, the prime mover cover 9 can be formed using an inexpensive, lightweight, thin steel plate or the like while maintaining durability (strength necessary for placing the driver's seat 10 on it).
- the driver's seat 10 is provided above the prime mover cover 9. Specifically, the driver's seat 10 is attached to the upper surface portion 9E of the motor cover 9 via the seat base 11. The driver's seat 10 is movable in the front-rear direction so that the seating position can be adjusted according to the body shape and operating posture of the operator.
- the driver's seat 10 includes a slide mechanism 10A, a seat 10B mounted on the slide mechanism 10A, and a backrest 10C extending upward from the rear of the seat 10B.
- the slide mechanism 10A can move the operator's seating position, that is, the position of the seat portion 10B and the backrest portion 10C in the front-rear direction.
- the slide mechanism 10A includes a fixed part fixed to the seat base 11 (motor cover 9), a moving part provided on the fixed part, and a moving part located between the fixed part and the moving part.
- the lever part 10A1 is provided at the center of the front side of the moving part and switches between moving and fixing the moving part. Therefore, the weight of the driver's seat 10 becomes larger due to the slide mechanism 10A, so the load acting on the object to which the driver's seat 10 is attached becomes larger.
- the lever portion 10A1 of the slide mechanism 10A can allow the seat portion 10B (moving portion) to move in the front-rear direction by being pulled upward.
- the lever portion 10A1 by lowering the lever portion 10A1, it is possible to restrict the movement of the seat portion 10B (moving portion) and fix the seating position.
- the driver's seat 10 In the driver's seat 10, the lower fixed part of the slide mechanism 10A is placed on the upper surface of the seat base 11, and in this state, a bolt (both not shown) inserted into the bolt insertion hole of the fixed part is inserted into the seat base 11. It is screwed into a screw hole 12F provided in the base plate 12. Thereby, the driver's seat 10 is attached to the seat base 11 so as to be movable in the longitudinal direction (seating position can be adjusted). Specifically, the seat portion 10B and backrest portion 10C of the driver's seat 10 are moved to the frontmost position shown in FIG. 4 by the slide mechanism 10A, the rearmost position shown in FIG. 5, and an intermediate position between the frontmost position and the rearmost position (FIG. (see) and can be fixed.
- the seat base 11 is provided between the upper surface portion 9E of the prime mover cover 9 and the driver's seat 10. Further, the seat base 11 fixes the driver's seat 10 to the upper side of the motor cover 9.
- the seat base 11 includes a base plate 12, a handle 14, seat belt attachment parts 15 and 16, a grease gun attachment part 17, and a cup holder attachment part 18.
- the base plate 12 includes a middle plate part 12A made of a square frame-shaped flat plate, and a front plate part 12B bent from the front edge of the middle plate part 12A and extending downward. It is formed by a rear plate part 12C that is located on the rear side of the middle plate part 12A and extends further in the left-right direction than the middle plate part 12A.
- the front plate portion 12B is provided with two bolt insertion holes 12D as prime mover cover fixing portions at positions corresponding to the two screw holes 9J provided in the bracket 9H of the prime mover cover 9.
- the rear plate portion 12C is provided with four bolt insertion holes 12E as a prime mover cover fixing portion at positions corresponding to the four screw holes 9K provided in the top surface portion 9E of the prime mover cover 9.
- the base plate 12 is provided with four screw holes 12F located near the four corners of the middle plate portion 12A and serving as driver seat fixing portions. Bolts (all not shown) inserted through four bolt insertion holes provided in the slide mechanism 10A of the driver's seat 10 are screwed into the four screw holes 12F.
- the base plate 12 is placed on the top surface 9E of the prime mover cover 9, and the bolts 13 are inserted from the front side into the bolt insertion holes 12D on the front side, and the bolts 13 are inserted into the prime mover cover 9. 9 into the screw hole 9J. Further, a bolt 13 is inserted from above into the bolt insertion hole 12E on the rear side, and this bolt 13 is screwed into the screw hole 9K of the prime mover cover 9. Thereby, the seat base 11 can be attached to the upper surface portion 9E of the prime mover cover 9.
- driver's seat 10 (slide mechanism 10A) is placed on the base plate 12, and bolts inserted into four bolt insertion holes provided in the fixed portion of the slide mechanism 10A are screwed into the screw holes 12F. Thereby, the driver's seat 10 (slide mechanism 10A) can be attached to the seat base 11.
- the base plate 12 is provided as a separate member from the prime mover cover 9, it can be made stronger than the steel plate forming the prime mover cover 9, for example, by making the base plate thicker (increasing the plate thickness dimension) or by increasing the plate thickness. It can be formed using a strong material.
- the base plate 12 is bolted to the upper surface portion 9E of the prime mover cover 9 through six bolt insertion holes 12D and 12E that are distributed over a wider area than the four screw holes 12F. Therefore, even if the load from the driver's seat 10 or the load when the seatbelts 19 and 20 are pulled is applied to one location, the base plate 12 can distribute the load to six locations over a wide range while maintaining the power mover cover 9.
- the base plate 12 has a structure in which the bolts 13 for attaching the front side are laid down sideways (the axis lines are oriented sideways), and screwed onto the base plate 12 from the front side. Thereby, the bolt 13 can be easily turned without being obstructed by the driver's seat 10, and the workability of attaching and detaching the base plate 12 can be improved.
- the handles 14 are provided symmetrically on both left and right sides of the base plate 12. Therefore, the left and right handles 14 can be grasped from either the left or right when opening and closing the prime mover cover 9.
- the handle 14 is arranged on the front side from an intermediate position of the base plate 12 in the front-rear direction. That is, the handle 14 is disposed on the front side of the prime mover cover 9, far away from the rear connecting member 9F, which serves as a fulcrum when opening and closing the prime mover cover 9.
- the handle 14 can be grasped at a position away from the pivot point, and the prime mover cover 9 can be easily opened and closed with a small force. Furthermore, if the operator shakes while traveling, he or she can stabilize his or her body (posture) by grasping the handle 14.
- the handle 14 is arranged on the rear side of the front surface 9A1 of the front surface portion 9A of the prime mover cover 9. Therefore, the handle 14 is designed to prevent the legs (calf, etc.) of the operator sitting in the driver's seat 10 from inadvertently interfering with the handle 14.
- the handle 14 includes a bracket 14A that is located outside the seat 10B of the driver's seat 10 in the left-right direction and projects upward from the middle plate 12A of the base plate 12, and a bracket 14A that extends outside in the left-right direction from the top of the bracket 14A.
- a front grip part 14D extends inwardly and has a tip end reaching the front plate part 12B of the base plate 12, and a front grip part 14D that bends from the tip part of the front grip part 14D and extends rearward and is attached to the front plate part 12B. and a mounting bar 14E.
- the outer grip portion 14C is located on the outer side of the seat base 11 in the left-right direction and extends in the front-rear direction.
- the outer grip portion 14C is inclined downward toward the front side along the upper surface portion 9E of the prime mover cover 9.
- the outer grip part 14C has a predetermined gap between it and the upper surface part 9E so that even when wearing gloves, a hand can be inserted between the outer grip part 14C and the upper surface part 9E. ing.
- the outer grip portion 14C is arranged at a position lower than the seat surface (upper surface) of the seat portion 10B so as not to get in the way when sitting on the seat portion 10B of the driver's seat 10 and standing up. Further, as shown in FIG. 11, the outer grip portion 14C is inclined inward in the left-right direction toward the front side. Therefore, the outer grip portion 14C can suppress the overhang dimension of the front side position near the operator's legs to a small size. Thereby, even when the operator sits in the driver's seat 10 and places his/her legs close to the prime mover cover 9, the legs and the outer grip portion 14C do not interfere with each other.
- the front grip portion 14D is located on the front side of the seat base 11 and extends in the left-right direction. In addition, as shown in FIGS. 7 and 12, the front grip portion 14D is tilted downward from the outside to the inside in the left-right direction, so that the driver's seat 10 (of the slide mechanism 10A) is moved forward by the slide mechanism 10A.
- the moving part and the seat part 10B) are arranged at a lower position. Thereby, even when the driver's seat 10 is moved to the intermediate position shown in FIG. 3 or the frontmost position shown in FIG. 4, it is possible to avoid the driver's seat 10 from interfering with the front grip part 14D.
- the left and right mounting bars 14E (tips of the front gripping portions 14D) are widely separated in the left-right direction with the lever portion 10A1 of the slide mechanism 10A sandwiched between them. Therefore, the left and right mounting bars 14E can prevent interference with the lever portion 10A1 of the slide mechanism 10A even when the driver's seat 10 is moved to the intermediate position shown in FIG. 3 or to the foremost position shown in FIG. .
- the seat base 11 is provided with a mounting portion for mounting additional parts.
- the seat base 11 includes seat belt attachment parts 15 and 16 for attaching seat belts 19 and 20 (described later), a grease gun attachment part 17 for attaching a grease gun 21, and a cup holder for attaching a cup holder 22.
- a mounting portion 18 and the like are provided.
- a pair of seat belt attachment parts 15 and 16 are provided on both left and right sides of the rear plate part 12C of the base plate 12.
- the seat belt attachment parts 15 and 16 are made of plates bent in an L-shape, and their lower edges are fixed to the rear plate part 12C.
- screw holes 15A, 16A are provided in the mounting surfaces of the seat belt mounting parts 15, 16 that extend in the front-rear direction.
- a base 19A is attached to the left seat belt attachment portion 15 by screwing a bolt inserted through the base 19A of the left seat belt 19 into a screw hole 15A.
- a base portion 20A is attached to the right seat belt attachment portion 16 by screwing a bolt inserted through the base portion 20A of the right seat belt 20 into a screw hole 16A.
- the seat belt is generally attached to a location other than the driver's seat, for example, to the motor cover. Furthermore, according to European standards, the mounting strength of the seat belt must be strong enough to withstand even when the seat belt is pulled with a force of 15,000N.
- the prime mover cover 9 of this embodiment is formed using a thin steel plate or the like, in the configuration in which the seat belts 19 and 20 are bolted directly to the prime mover cover 9, stress is generated at one bolted portion. There is a possibility that it will not be able to withstand a concentrated force of 15,000N.
- the seat belt attachment parts 15 and 16 are attached to a strong seat base 11, and are attached to the prime mover cover 9 via this seat base 11. Therefore, the load that is applied to the seat belt attachment parts 15 and 16 when the seat belts 19 and 20 are pulled can be transmitted to the prime mover cover 9 via the seat base 11 in a widely dispersed state.
- the grease gun mounting portion 17 is provided at the rear of the base plate 12.
- the grease gun mounting portion 17 has a plurality of, for example, two, screw holes 17A provided at intervals in the left-right direction on a mounting surface extending in the horizontal direction.
- a grease gun holder 21A (grease gun 21) is attached to the grease gun attachment portion 17 by screwing a bolt inserted through the grease gun holder 21A into a screw hole 17A.
- the cup holder attachment part 18 is provided on the right handle 14.
- the cup holder attachment portion 18 is fixed to the distal end side of the outward bar 14B and extends upward.
- a screw hole 18A is provided on the upper side of the cup holder attachment portion 18, into which a bolt (not shown) for attaching the cup holder 22 is screwed.
- the left seat belt 19 is attached to the left seat belt attachment part 15.
- the left seat belt 19 is attached to the seat belt attachment portion 15 by screwing a bolt inserted through the base portion 19A into a screw hole 15A of the seat belt attachment portion 15.
- the right seat belt 20 is attached to the right seat belt attachment portion 16.
- the right seat belt 20 is attached to the seat belt attachment portion 16 by screwing a bolt inserted through the base portion 20A into a screw hole 16A of the seat belt attachment portion 16.
- the left seat belt 19 and the right seat belt 20 are connected around the abdomen of the operator sitting in the driver's seat 10, so that the operator can be fixed to the driver's seat 10.
- the grease gun 21 is provided on the rear side of the seat base 11.
- the grease gun 21 is a tool for filling the oil supply portion of the hydraulic excavator 1 with grease as a lubricant.
- the grease gun 21 includes a grease gun holder 21A.
- the grease gun holder 21A is placed on the grease gun mounting portion 17. In this state, the grease gun holder 21A is attached to the grease gun attachment portion 17 by screwing the inserted bolt into the screw hole 17A.
- the cup holder 22 is provided on the right handle 14 of the seat base 11.
- the cup holder 22 is made of a cylindrical body with a bottom, and a beverage container can be housed inside the cup holder 22 .
- the cup holder 22 is attached to the cup holder attachment part 18 by screwing a bolt inserted through the side of the cup holder 22 into the screw hole 18A of the cup holder attachment part 18.
- the floor 23 is provided to extend from the prime mover cover 9 to the front side.
- the lever stand 24 is erected at the front of the floor 23.
- An operating lever 25 for traveling and an operating lever 26 for working are provided on the upper part of the lever stand 24.
- the roll bar 27 is attached to the rear side of the counterweight 5C of the swing frame 5.
- the roll bar 27 is constituted by an inverted U-shaped strength member that extends to a higher position than the operator sitting in the driver's seat 10. Thereby, the roll bar 27 can protect the operator when a structure falls or when the hydraulic excavator 1 is turned upside down. Further, as shown in FIG. 2, when the prime mover cover 9 is opened, the roll bar 27 can be rotated horizontally and retracted so as not to get in the way.
- the hydraulic excavator 1 has the configuration described above, and its operation will be described next.
- the operator boards the floor 23 and sits in the driver's seat 10. At this time, the operator can move the position of the seat part 10B back and forth as desired by operating the lever part 10A1 of the slide mechanism 10A. After adjusting the driver's seat 10 to a desired position, the operator connects the seat belt 19 and the seat belt 20.
- An operator seated in the driver's seat 10 can cause the lower traveling body 2 to travel by operating the operating lever 25 for traveling on the lever stand 24.
- the operator can perform earth and sand excavation work by rotating the upper revolving body 3 or rotating the working device 4 by operating the operation lever 26 for work.
- the seat base 11 is provided between the upper surface portion 9E of the prime mover cover 9 that covers the engine 7 in an openable/closable manner and the driver's seat 10, and that fixes the driver's seat 10 to the upper side of the prime mover cover 9.
- the base plate 12 of the seat base 11 also has four screw holes 12F as a driver's seat fixing part to be attached to the driver's seat 10, and six bolt insertion holes 12D as a prime mover cover fixing part to be attached to the prime mover cover 9. , 12E.
- the bolt insertion holes 12D and 12E of the base plate 12 are arranged over a wider range than the screw holes 12F.
- the area of the polygonal surface whose vertices are the six bolt insertion holes 12D and 12E as the prime mover cover fixing section is equal to the area of the polygonal surface whose vertices are the four screw holes 12F as the driver's seat fixing section.
- the seat base 11 can be attached to the prime mover cover 9 before the driver's seat 10 is attached. That is, when the driver's seat 10 is installed, there are places where the seat base 11 relative to the prime mover cover 9 cannot be reached by screw tightening tools such as spanners and socket wrenches, specifically, inside the seat belt attachment parts 15 and 16.
- the mounting position (bolt position) can be set.
- the seat base 11 can be mounted at a plurality of locations over a wide range of the motor cover 9. Thereby, the load acting on the seat base 11 from the driver's seat 10 can be distributed to a plurality of mounting positions by the seat base 11. As a result, it is possible to prevent the load from being concentrated on a part of the prime mover cover 9, so that deformation of the prime mover cover 9 can be suppressed even when the strength of the prime mover cover 9 is kept low.
- the driver's seat 10 is provided with the slide mechanism 10A that moves the seating position in the front-back direction, so the weight of the driver's seat 10 becomes larger, and the load applied to the mounting portion of the driver's seat 10 is further increased. growing. Even in this case, with the mounting structure in which the seat base 11 is interposed between the prime mover cover 9 and the driver's seat 10, the load applied to the prime mover cover 9 can be distributed and deformation of the prime mover cover 9 can be prevented.
- the mounting position of the seat base 11 with respect to the prime mover cover 9 can be set even if the specifications of the driver's seat 10 are different.
- the mounting position of the seat base 11 on the top surface 9E of the prime mover cover 9 is a position away from the center of the top surface 9E, which is easily deformed, that is, the fulcrum point when a load is applied to the top surface 9E of the prime mover cover 9. It can be set at a position near the bent part of the motor cover, which is the starting point of deformation.
- the prime mover cover 9 when a load is applied to the upper part 9E of the prime mover cover 9 near the bending part (ridge line part) between the front part 9A, the rear part 9B, the left part 9C, and the right part 9D. , the distance between the point of action and the fulcrum becomes shorter, and the bending moment for the same load becomes smaller. Thereby, since the screw holes 9J and 9K are provided near the bent portions, the prime mover cover 9 is less likely to be deformed, and its durability against loads can be further improved.
- the seat base 11 is provided with a handle 14 for opening and closing the prime mover cover 9.
- a handle 14 for opening and closing the prime mover cover 9.
- the load that acts on the prime mover cover 9 when the handle 14 is grasped and the prime mover cover 9 is opened/closed is increased. Since the components are dispersed, deformation of the motor cover 9 can be prevented.
- the prime mover cover 9 is formed as an openable/closable cover whose front side can be opened and closed in the vertical direction with the rear side as a fulcrum.
- the handle 14 includes an outer grip part 14C located on the outside of the seat base 11 in the left-right direction and extending in the front-rear direction, and a front grip part 14D located in the front side of the seat base 11 and extending in the left-right direction. , is equipped with. Thereby, the handle 14 can be grasped from either the left or right side of the hydraulic excavator 1. Moreover, the handle 14 can also be grasped from the front side.
- the handle 14 is arranged on the rear side of the front surface 9A1 of the front surface portion 9A of the prime mover cover 9. Therefore, the handle 14 can prevent the legs (calf, etc.) of the operator sitting in the driver's seat 10 from inadvertently interfering with the handle 14, thereby improving work efficiency.
- the driver's seat 10 includes a slide mechanism 10A that allows the seating position to be moved in the front and rear directions.
- the front grip part 14D of the handle 14 is tilted downward from the outside to the inside in the left-right direction, so that the driver's seat 10 (the moving part of the slide mechanism 10A, the seat part) that has been moved forward by the slide mechanism 10A 10B).
- the front grip part 14D of the handle 14 avoids interference with the driver's seat 10 (the moving part of the slide mechanism 10A, the seat part 10B) even when the driver's seat 10 is moved forward by the slide mechanism 10A. be able to.
- the seat base 11 is provided with seat belt attachment parts 15 and 16, a grease gun attachment part 17, and a cup holder attachment part 18.
- the seat belts 19 and 20 can be attached to the seat base 11 using the seat belt attaching parts 15 and 16.
- the grease gun 21 can be attached using the grease gun attachment part 17.
- the cup holder 22 can be attached using the cup holder attachment part 18.
- the seat base 11 is attached to the upper surface part 9E of the prime mover cover 9 using six bolts 13, and the slide mechanism 10A of the driver's seat 10 is attached to the seat base 11 using four bolts.
- the seat base 11 is attached to the upper surface portion 9E of the prime mover cover 9 using 2 to 5 or 7 or more bolts 13
- the slide mechanism 10A of the driver's seat 10 may be attached to the seat base 11 using the following.
- the mounting position of the seat base 11 with respect to the upper surface portion 9E of the prime mover cover 9 is set to the inside of the seat belt attachment portions 15 and 16 near the front surface portion 9A, rear surface portion 9B, left surface portion 9C, and right surface portion 9D.
- This example shows the case where
- the present invention is not limited thereto, and for example, the mounting position of the seat base 11 relative to the upper surface portion 9E of the prime mover cover 9 may be set below the driver's seat 10.
- the present invention is not limited to this, and for example, the front, left, or right portion of the motor cover 9 may be rotatably attached to the vehicle body.
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Abstract
A hydraulic excavator (1) includes a seat base (11) that is provided between the driver's seat (10) and the top surface (9E) of a motor cover (9) covering an engine (7) in an openable and closable manner, and that secures the driver's seat (10) to the upper side of the motor cover (9). In addition, a base plate (12) of the seat base (11) includes four screw holes (12F) as a driver's seat securing unit for attaching to the driver's seat (10), and six bolt insertion holes (12D, 12E) as a motor cover securing unit for attaching to the motor cover (9). Additionally, the bolt insertion holes (12D, 12E) of the base plate (12) are arranged more widely than the screw holes (12F). Thus, the seat base (11) can be attached to the motor cover (9) before the driver's seat (10) is attached.
Description
本発明は、原動機を覆う原動機カバーの上側に運転席が設けられた建設機械に関する。
The present invention relates to a construction machine in which a driver's seat is provided above a prime mover cover that covers a prime mover.
建設機械としての油圧ショベルは、自走が可能な下部走行体と、下部走行体上に旋回可能に設けられた上部旋回体と、上部旋回体の前側に回動可能に設けられた作業装置と、により構成されている。
A hydraulic excavator as a construction machine consists of a lower traveling body that is capable of self-propulsion, an upper rotating body that is rotatably provided on the lower traveling body, and a working device that is rotatably installed in front of the upper rotating body. , is composed of.
ここで、油圧ショベルのうち、ミニショベルと呼ばれる超小型の油圧ショベルは、上部旋回体における機器類の設置スペースが小さく制限されている。超小型の油圧ショベルの上部旋回体は、支持構造体をなす旋回フレームと、旋回フレームの後側に設けられたエンジン等の原動機と、原動機を開閉可能に覆う原動機カバーと、原動機カバーの上側に設けられ、オペレータが座る運転席と、を備えている(特許文献1)。
Here, among hydraulic excavators, ultra-compact hydraulic excavators called mini excavators have a small space for installing equipment in the upper revolving structure. The upper revolving body of an ultra-compact hydraulic excavator consists of a revolving frame that serves as a support structure, a prime mover such as an engine installed on the rear side of the revolving frame, a prime mover cover that covers the prime mover so that it can be opened and closed, and a rotary cover that covers the prime mover cover on the upper side of the prime mover cover. and a driver's seat where an operator sits (Patent Document 1).
ここで、原動機カバーは、開閉作業を容易にしたり、コストを削減したりするために、例えば、薄い鋼板によって形成されている。そして、運転席は、例えば、複数本のボルトを用いて原動機カバー上に取付けられている。
Here, the prime mover cover is formed of, for example, a thin steel plate in order to facilitate opening and closing operations and reduce costs. The driver's seat is mounted on the prime mover cover using, for example, a plurality of bolts.
特許文献1の油圧ショベルは、複数本のボルトを用いて運転席を原動機カバー上に取付ける構成としている。この場合、原動機カバーの運転席を取付ける部分には、運転席や運転席に着座するオペレータの重量等によって負荷が加わる。そして、運転席を原動機カバー上に取付けるボルトの配置は、スパナ等のねじ締め工具が届く位置になるよう、運転席の形状仕様に基づき、運転席の周囲に集中してしまう。このために、原動機カバーの一部に負荷が集中してしまい、原動機カバーが変形し易いという問題がある。
The hydraulic excavator of Patent Document 1 has a configuration in which the driver's seat is attached onto the prime mover cover using a plurality of bolts. In this case, a load is applied to the portion of the prime mover cover to which the driver's seat is attached due to the weight of the driver's seat or the operator sitting in the driver's seat. The bolts for attaching the driver's seat to the prime mover cover are concentrated around the driver's seat based on the shape specifications of the driver's seat so that screw tightening tools such as spanners can reach the bolts. For this reason, there is a problem in that the load is concentrated on a part of the prime mover cover, and the prime mover cover is easily deformed.
本発明は、上述した従来技術の問題に鑑みなされたもので、本発明の目的は、原動機カバーの一部に負荷が集中することを防止して、原動機カバーの変形を抑えることができるようにした建設機械を提供することにある。
The present invention was made in view of the problems of the prior art described above, and an object of the present invention is to prevent the load from being concentrated on a part of the prime mover cover and to suppress deformation of the prime mover cover. Our goal is to provide construction machinery with improved quality.
本発明は、自走可能な下部走行体と、前記下部走行体上に旋回可能に設けられた上部旋回体と、を備え、前記上部旋回体は、支持構造体をなす旋回フレームと、前記旋回フレームの後側に設けられた原動機と、前記原動機を開閉可能に覆う原動機カバーと、前記原動機カバーの上側に設けられた運転席と、を備えた建設機械において、前記原動機カバーの上面部と前記運転席との間に設けられ、前記運転席を前記原動機カバーの上側に固定するシートベースを備え、前記シートベースは、前記運転席に取付けられる運転席固定部と、前記原動機カバーに取付けられる原動機カバー固定部と、を有し、前記シートベースの前記原動機カバー固定部は、前記運転席固定部よりも広範囲に配置されている。
The present invention includes a self-propelled lower traveling body, and an upper rotating body rotatably provided on the lower traveling body, and the upper rotating body includes a rotating frame forming a support structure, and a rotating upper rotating body. A construction machine comprising: a prime mover provided on the rear side of a frame; a prime mover cover that covers the prime mover in an openable/closable manner; and a driver's seat provided above the prime mover cover. A seat base is provided between the driver's seat and the driver's seat and fixes the driver's seat above the prime mover cover, and the seat base includes a driver's seat fixing part attached to the driver's seat and a prime mover attached to the prime mover cover. and a cover fixing part, and the motor cover fixing part of the seat base is arranged over a wider area than the driver's seat fixing part.
本発明によれば、原動機カバーの一部に負荷が集中することを防止でき、原動機カバーの変形を抑えることができる。
According to the present invention, it is possible to prevent load from being concentrated on a part of the prime mover cover, and it is possible to suppress deformation of the prime mover cover.
以下、本発明に係る建設機械の実施形態を、油圧ショベルに適用した場合を例に挙げ、図1ないし図12を参照しつつ詳細に説明する。
Hereinafter, an embodiment of the construction machine according to the present invention will be described in detail with reference to FIGS. 1 to 12, taking as an example the case where it is applied to a hydraulic excavator.
図1、図2において、油圧ショベル1は、自走が可能なクローラ式の下部走行体2と、下部走行体2上に旋回可能に搭載された上部旋回体3と、上部旋回体3の前側に回動と揺動が可能なスイング式の作業装置4と、により構成されている。ここで、実施形態による油圧ショベル1は、建物の内部での解体作業、路地等の狭い場所での掘削作業に用いることができる、例えば機械重量(総重量)が1トン程度の超ミニショベルと呼ばれる機種である。
In FIGS. 1 and 2, a hydraulic excavator 1 includes a crawler-type lower body 2 that is capable of self-propulsion, an upper rotating body 3 that is rotatably mounted on the lower body 2, and a front side of the upper rotating body 3. It is comprised of a swing-type working device 4 that can rotate and swing. Here, the hydraulic excavator 1 according to the embodiment is an ultra-mini excavator with a machine weight (total weight) of about 1 ton, which can be used for demolition work inside a building and excavation work in narrow places such as alleys. This is the model called.
上部旋回体3は、旋回フレーム5、エンジン7、原動機カバー9、運転席10、シートベース11、シートベルト19,20、グリスガン21、カップホルダ22を含んで構成されている。
The upper revolving body 3 includes a revolving frame 5, an engine 7, a prime mover cover 9, a driver's seat 10, a seat base 11, seat belts 19, 20, a grease gun 21, and a cup holder 22.
旋回フレーム5は、前後方向に延びる長方形状をした金属製の厚板からなる底板5Aと、底板5Aの前部に前方に突出して設けられた支持部5Bと、底板5Aの後部に左右方向に延びつつ、上側に延びたカウンタウエイト5Cと、を含んで構成されている。支持部5Bは、作業装置4を左右方向に揺動可能に支持している。
The rotating frame 5 includes a bottom plate 5A made of a thick rectangular metal plate extending in the front-rear direction, a support portion 5B provided at the front of the bottom plate 5A so as to protrude forward, and a support portion 5B provided at the rear of the bottom plate 5A in the left-right direction. It is configured to include a counterweight 5C extending upwardly. The support portion 5B supports the working device 4 so as to be swingable in the left-right direction.
カウンタウエイト5Cは、作業装置4との重量バランスをとるための重量物として形成されている。カウンタウエイト5Cの上面には、後述する原動機カバー9の連結部材9Fが取付けられている。これにより、連結部材9Fを介してカウンタウエイト5Cの上部に原動機カバー9を開閉可能(回動可能)に支持することができる。また、旋回フレーム5(カウンタウエイト5C)の後側には、後述のロールバー27が取付けられている。
The counterweight 5C is formed as a heavy object to balance the weight with the working device 4. A connecting member 9F of a motor cover 9, which will be described later, is attached to the upper surface of the counterweight 5C. Thereby, the prime mover cover 9 can be supported in an openable and closable (rotatable) manner on the upper part of the counterweight 5C via the connecting member 9F. Further, a roll bar 27, which will be described later, is attached to the rear side of the swing frame 5 (counterweight 5C).
側面カバー6は、旋回フレーム5の底板5Aの周囲を囲むように設けられている。側面カバー6は、カウンタウエイト5Cと同等の高さ寸法をもって立設されている。また、側面カバー6は、後側が開放されるようにU字状に折り曲げられて形成されている。
The side cover 6 is provided so as to surround the bottom plate 5A of the rotating frame 5. The side cover 6 is erected to have the same height as the counterweight 5C. Further, the side cover 6 is formed by being bent into a U-shape so that the rear side is open.
エンジン7は、原動機を構成するもので、旋回フレーム5の後側に設けられている。エンジン7は、カウンタウエイト5Cの前側に位置し、左右方向に延びる横置き状態で配設されている。エンジン7は、油圧ポンプ8(図8参照)を駆動するものである。なお、原動機としては、エンジンと電動モータからなるハイブリッド式の原動機、または電動モータを用いることもできる。
The engine 7 constitutes a prime mover and is provided on the rear side of the swing frame 5. The engine 7 is located in front of the counterweight 5C and is disposed horizontally extending in the left-right direction. The engine 7 drives a hydraulic pump 8 (see FIG. 8). Note that as the prime mover, a hybrid type prime mover consisting of an engine and an electric motor, or an electric motor can also be used.
原動機カバー9は、エンジン7を開閉可能に覆っている。原動機カバー9は、後側を支点として前側が上下方向に開閉可能な開閉式カバーとして形成されている。図9に示すように、原動機カバー9は、前面部9A、後面部9B、左面部9C、右面部9Dおよび上面部9Eにより下側が開口したボックス状に形成されている。図3に示すように、前面部9Aの下側部分は、原動機カバー9の最前部で垂直方向に延びた前面9A1となっている。また、原動機カバー9の上面部9Eは、緩やかに湾曲しつつ前下がりに形成されている。
The prime mover cover 9 covers the engine 7 in an openable and closable manner. The prime mover cover 9 is formed as an openable/closable cover whose front side can be opened and closed in the vertical direction with the rear side as a fulcrum. As shown in FIG. 9, the prime mover cover 9 is formed into a box shape with a front side 9A, a rear side 9B, a left side 9C, a right side 9D, and a top side 9E with an open bottom. As shown in FIG. 3, the lower portion of the front surface portion 9A is a front surface 9A1 extending in the vertical direction at the forefront of the motor cover 9. As shown in FIG. Further, the upper surface portion 9E of the prime mover cover 9 is formed to be gently curved and downwardly toward the front.
図8に示すように、後面部9Bの下部には、開閉するときの支点となる連結部材9Fが設けられている。原動機カバー9は、この連結部材9Fを介してカウンタウエイト5Cに回動可能に取付けられている。一方、前面部9Aには、開閉レバー9Gが設けられている。原動機カバー9は、開閉レバー9Gを操作することで旋回フレーム5側の構造物に対する連結(ロック)が解除されて開くことができる(上側に回動することができる)。
As shown in FIG. 8, a connecting member 9F that serves as a fulcrum when opening and closing is provided at the lower part of the rear surface portion 9B. The motor cover 9 is rotatably attached to the counterweight 5C via this connecting member 9F. On the other hand, the front part 9A is provided with an opening/closing lever 9G. By operating the opening/closing lever 9G, the prime mover cover 9 can be unlocked from the structure on the swing frame 5 side and opened (rotated upward).
図9に示すように、上面部9Eの前部には、左右方向に延びてブラケット9Hが立設されている。ブラケット9Hには、左右方向に間隔をもって複数個、例えば、2個のねじ孔9Jが設けられている。また、上面部9Eの後部には、左右方向に間隔をもって複数個、例えば、4個のねじ孔9Kが設けられている。前側のねじ孔9Jには、シートベース11の前部を取付けるためのボルト13が螺着される。一方、後側のねじ孔9Kには、シートベース11の後部を取付けるためのボルト13が螺着される。
As shown in FIG. 9, a bracket 9H is erected at the front portion of the upper surface portion 9E and extends in the left-right direction. The bracket 9H is provided with a plurality of screw holes 9J, for example, two screw holes, spaced apart from each other in the left-right direction. Further, a plurality of screw holes 9K, for example, four screw holes, are provided at the rear portion of the upper surface portion 9E at intervals in the left-right direction. A bolt 13 for attaching the front portion of the seat base 11 is screwed into the front screw hole 9J. On the other hand, a bolt 13 for attaching the rear part of the seat base 11 is screwed into the rear screw hole 9K.
ここで、上面部9Eに設けられた6個のねじ孔9J,9Kは、上面部9Eの広い範囲に配置されている。この上で、6個のねじ孔9J,9Kは、ボルト13を用いてシートベース11を取付けた状態では、当該シートベース11によって繋がっている。従って、1個のねじ孔9Jまたはねじ孔9Kに負荷が作用したとしても、この負荷を他の5個のねじ孔9J,9Kに分散させることができる。これにより、原動機カバー9は、耐久性(運転席10を載せるのに必要な強度)を維持しつつ、安価で軽量な薄い鋼板等を用いて形成することができる。
Here, the six screw holes 9J and 9K provided in the upper surface portion 9E are arranged in a wide range of the upper surface portion 9E. Further, the six screw holes 9J and 9K are connected by the seat base 11 when the seat base 11 is attached using the bolts 13. Therefore, even if a load acts on one screw hole 9J or 9K, this load can be distributed to the other five screw holes 9J and 9K. As a result, the prime mover cover 9 can be formed using an inexpensive, lightweight, thin steel plate or the like while maintaining durability (strength necessary for placing the driver's seat 10 on it).
運転席10は、原動機カバー9の上側に設けられている。詳しくは、運転席10は、シートベース11を介して原動機カバー9の上面部9Eに取付けられている。運転席10は、オペレータの体形や操作姿勢に応じて着座位置を調整できるように、前後方向に移動可能となっている。運転席10は、スライド機構10Aと、スライド機構10A上に取付けられた座部10Bと、座部10Bの後部から上側に延びた背もたれ部10Cと、を備えている。
The driver's seat 10 is provided above the prime mover cover 9. Specifically, the driver's seat 10 is attached to the upper surface portion 9E of the motor cover 9 via the seat base 11. The driver's seat 10 is movable in the front-rear direction so that the seating position can be adjusted according to the body shape and operating posture of the operator. The driver's seat 10 includes a slide mechanism 10A, a seat 10B mounted on the slide mechanism 10A, and a backrest 10C extending upward from the rear of the seat 10B.
スライド機構10Aは、オペレータの着座位置、即ち、座部10Bと背もたれ部10Cの位置を前後方向に移動することができる。スライド機構10Aは、シートベース11(原動機カバー9)に固定される固定部と、固定部上に設けられた移動部と、固定部と移動部との間に位置して固定部上で移動部を前後方向に移動させるスライドレールと、移動部の前側の中央部に設けられ、移動部の移動と固定を切換えるレバー部10A1と、を備えている。このため、運転席10は、スライド機構10Aによって重量がより大きくなるから、運転席10を取付ける対象に作用する負荷が大きくなる。
The slide mechanism 10A can move the operator's seating position, that is, the position of the seat portion 10B and the backrest portion 10C in the front-rear direction. The slide mechanism 10A includes a fixed part fixed to the seat base 11 (motor cover 9), a moving part provided on the fixed part, and a moving part located between the fixed part and the moving part. The lever part 10A1 is provided at the center of the front side of the moving part and switches between moving and fixing the moving part. Therefore, the weight of the driver's seat 10 becomes larger due to the slide mechanism 10A, so the load acting on the object to which the driver's seat 10 is attached becomes larger.
例えば、スライド機構10Aのレバー部10A1は、上側に引き上げられることで、座部10B(移動部)が前後方向に移動するのを許すことができる。一方、レバー部10A1は、下側に降ろされることで、座部10B(移動部)の移動を規制して着座位置を固定することができる。
For example, the lever portion 10A1 of the slide mechanism 10A can allow the seat portion 10B (moving portion) to move in the front-rear direction by being pulled upward. On the other hand, by lowering the lever portion 10A1, it is possible to restrict the movement of the seat portion 10B (moving portion) and fix the seating position.
運転席10は、スライド機構10Aの下側の固定部がシートベース11の上面に載せられ、この状態で、固定部のボルト挿通孔に挿通したボルト(いずれも図示せず)をシートベース11のベース板12に設けられたねじ孔12Fに螺着する。これにより、運転席10は、シートベース11に前後方向に移動可能(着座位置を調整可能)に取付けられている。具体的には、運転席10の座部10Bおよび背もたれ部10Cは、スライド機構10Aによって図4に示す最前位置、図5に示す最後位置および最前位置と最後位置との間の中間位置(図3参照)に移動可能、かつ固定可能となっている。
In the driver's seat 10, the lower fixed part of the slide mechanism 10A is placed on the upper surface of the seat base 11, and in this state, a bolt (both not shown) inserted into the bolt insertion hole of the fixed part is inserted into the seat base 11. It is screwed into a screw hole 12F provided in the base plate 12. Thereby, the driver's seat 10 is attached to the seat base 11 so as to be movable in the longitudinal direction (seating position can be adjusted). Specifically, the seat portion 10B and backrest portion 10C of the driver's seat 10 are moved to the frontmost position shown in FIG. 4 by the slide mechanism 10A, the rearmost position shown in FIG. 5, and an intermediate position between the frontmost position and the rearmost position (FIG. (see) and can be fixed.
次に、本実施形態の特徴部分となるシートベース11の構成および効果について詳細に説明する。
Next, the configuration and effects of the seat base 11, which are the characteristic parts of this embodiment, will be explained in detail.
シートベース11は、原動機カバー9の上面部9Eと運転席10との間に設けられている。また、シートベース11は、運転席10を原動機カバー9の上側に固定する。シートベース11は、ベース板12、把手14、シートベルト取付部15,16、グリスガン取付部17、カップホルダ取付部18を備えている。
The seat base 11 is provided between the upper surface portion 9E of the prime mover cover 9 and the driver's seat 10. Further, the seat base 11 fixes the driver's seat 10 to the upper side of the motor cover 9. The seat base 11 includes a base plate 12, a handle 14, seat belt attachment parts 15 and 16, a grease gun attachment part 17, and a cup holder attachment part 18.
図9ないし図11に示すように、ベース板12は、角枠状の平板からなる中板部12Aと、中板部12Aの前端縁から屈曲して下側に延びた前板部12Bと、中板部12Aの後側に位置して中板部12Aよりも左右方向に大きく延びた後板部12Cと、により形成されている。前板部12Bには、原動機カバー9のブラケット9Hに設けられた2個のねじ孔9Jに対応する位置に原動機カバー固定部としての2個のボルト挿通孔12Dが設けられている。また、後板部12Cには、原動機カバー9の上面部9Eに設けられた4個のねじ孔9Kに対応する位置に原動機カバー固定部としての4個のボルト挿通孔12Eが設けられている。
As shown in FIGS. 9 to 11, the base plate 12 includes a middle plate part 12A made of a square frame-shaped flat plate, and a front plate part 12B bent from the front edge of the middle plate part 12A and extending downward. It is formed by a rear plate part 12C that is located on the rear side of the middle plate part 12A and extends further in the left-right direction than the middle plate part 12A. The front plate portion 12B is provided with two bolt insertion holes 12D as prime mover cover fixing portions at positions corresponding to the two screw holes 9J provided in the bracket 9H of the prime mover cover 9. Further, the rear plate portion 12C is provided with four bolt insertion holes 12E as a prime mover cover fixing portion at positions corresponding to the four screw holes 9K provided in the top surface portion 9E of the prime mover cover 9.
さらに、ベース板12には、中板部12Aの四隅寄りに位置して運転席固定部としての4個のねじ孔12Fが設けられている。4個のねじ孔12Fには、運転席10のスライド機構10Aに設けられた4個のボルト挿通孔に挿通したボルト(いずれも図示せず)が螺着される。
Further, the base plate 12 is provided with four screw holes 12F located near the four corners of the middle plate portion 12A and serving as driver seat fixing portions. Bolts (all not shown) inserted through four bolt insertion holes provided in the slide mechanism 10A of the driver's seat 10 are screwed into the four screw holes 12F.
そして、図9に示すように、ベース板12は、原動機カバー9の上面部9E上に配置された状態で、前側のボルト挿通孔12Dに前側からボルト13を挿通し、このボルト13を原動機カバー9のねじ孔9Jに螺着する。また、後側のボルト挿通孔12Eに上側からボルト13を挿通し、このボルト13を原動機カバー9のねじ孔9Kに螺着する。これにより、シートベース11を原動機カバー9の上面部9Eに取付けることができる。
As shown in FIG. 9, the base plate 12 is placed on the top surface 9E of the prime mover cover 9, and the bolts 13 are inserted from the front side into the bolt insertion holes 12D on the front side, and the bolts 13 are inserted into the prime mover cover 9. 9 into the screw hole 9J. Further, a bolt 13 is inserted from above into the bolt insertion hole 12E on the rear side, and this bolt 13 is screwed into the screw hole 9K of the prime mover cover 9. Thereby, the seat base 11 can be attached to the upper surface portion 9E of the prime mover cover 9.
さらに、ベース板12には、運転席10(スライド機構10A)が載せられ、スライド機構10Aの固定部に設けられた4個のボルト挿通孔に挿通したボルトがねじ孔12Fに螺着される。これにより、シートベース11には、運転席10(スライド機構10A)を取付けることができる。
Furthermore, the driver's seat 10 (slide mechanism 10A) is placed on the base plate 12, and bolts inserted into four bolt insertion holes provided in the fixed portion of the slide mechanism 10A are screwed into the screw holes 12F. Thereby, the driver's seat 10 (slide mechanism 10A) can be attached to the seat base 11.
ここで、ベース板12は、原動機カバー9と別部材として設けられているから、原動機カバー9を形成する鋼板よりも高い強度、例えば、板厚を厚く(板厚寸法を大きく)したり、高強度な材料を用いて形成したりすることができる。この上で、ベース板12は、4個のねじ孔12Fよりも広範囲に分散して配置された6箇所のボルト挿通孔12D,12Eで、原動機カバー9の上面部9Eにボルト止めされている。従って、ベース板12は、運転席10からの負荷やシートベルト19,20が引っ張られたときの負荷が1箇所に作用しても、この負荷を広範囲の6箇所に分散した状態で原動機カバー9に伝えることができる。また、ベース板12は、前側を取付けるボルト13を横倒し(軸線が横向き)とし、前側から螺着する構成としている。これにより、ボルト13は、運転席10に邪魔されることなく容易に回すことができ、ベース板12の着脱作業の作業性を向上することができる。
Here, since the base plate 12 is provided as a separate member from the prime mover cover 9, it can be made stronger than the steel plate forming the prime mover cover 9, for example, by making the base plate thicker (increasing the plate thickness dimension) or by increasing the plate thickness. It can be formed using a strong material. In addition, the base plate 12 is bolted to the upper surface portion 9E of the prime mover cover 9 through six bolt insertion holes 12D and 12E that are distributed over a wider area than the four screw holes 12F. Therefore, even if the load from the driver's seat 10 or the load when the seatbelts 19 and 20 are pulled is applied to one location, the base plate 12 can distribute the load to six locations over a wide range while maintaining the power mover cover 9. can be conveyed to. Further, the base plate 12 has a structure in which the bolts 13 for attaching the front side are laid down sideways (the axis lines are oriented sideways), and screwed onto the base plate 12 from the front side. Thereby, the bolt 13 can be easily turned without being obstructed by the driver's seat 10, and the workability of attaching and detaching the base plate 12 can be improved.
把手14は、ベース板12の左右両側に対称形状をなすように設けられている。従って、左右の把手14は、左右のどちらからでも原動機カバー9を開閉操作するときに掴むことができる。把手14は、ベース板12の前後方向の中間位置から前側に配置されている。即ち、把手14は、原動機カバー9を開閉するときの支点となる後側の連結部材9Fから大きく離れた原動機カバー9の前側に配置されている。これにより、原動機カバー9を開閉するときには、回動支点から離れた位置で把手14を掴むことができ、原動機カバー9を小さな力で簡単に開閉操作することができる。また、オペレータは、走行中に揺れた場合、把手14を掴むことによって身体(姿勢)を安定させることができる。
The handles 14 are provided symmetrically on both left and right sides of the base plate 12. Therefore, the left and right handles 14 can be grasped from either the left or right when opening and closing the prime mover cover 9. The handle 14 is arranged on the front side from an intermediate position of the base plate 12 in the front-rear direction. That is, the handle 14 is disposed on the front side of the prime mover cover 9, far away from the rear connecting member 9F, which serves as a fulcrum when opening and closing the prime mover cover 9. Thereby, when opening and closing the prime mover cover 9, the handle 14 can be grasped at a position away from the pivot point, and the prime mover cover 9 can be easily opened and closed with a small force. Furthermore, if the operator shakes while traveling, he or she can stabilize his or her body (posture) by grasping the handle 14.
図3ないし図5に示すように、把手14は、原動機カバー9の前面部9Aの前面9A1よりも後側に配置されている。従って、把手14は、運転席10に座ったオペレータの脚(ふくらはぎ等)が不用意に干渉しないようになっている。
As shown in FIGS. 3 to 5, the handle 14 is arranged on the rear side of the front surface 9A1 of the front surface portion 9A of the prime mover cover 9. Therefore, the handle 14 is designed to prevent the legs (calf, etc.) of the operator sitting in the driver's seat 10 from inadvertently interfering with the handle 14.
把手14は、運転席10の座部10Bよりも左右方向の外側に位置してベース板12の中板部12Aから上向きに突出したブラケット14Aと、ブラケット14Aの上部から左右方向の外側に延びた外向きバー14Bと、外向きバー14Bの先端部(外側の端部)から屈曲して前側に延びた外側把持部14Cと、外側把持部14Cの先端部(前端部)から屈曲して左右方向の内側に延び、その先端部がベース板12の前板部12Bに達した前側把持部14Dと、前側把持部14Dの先端部から屈曲して後側に延び、前板部12Bに取付けられた取付バー14Eと、により構成されている。
The handle 14 includes a bracket 14A that is located outside the seat 10B of the driver's seat 10 in the left-right direction and projects upward from the middle plate 12A of the base plate 12, and a bracket 14A that extends outside in the left-right direction from the top of the bracket 14A. An outward bar 14B, an outer grip part 14C bent from the tip (outer end) of the outward bar 14B and extending forward, and an outer grip part 14C bent from the tip (front end) of the outer grip part 14C in the left-right direction. A front grip part 14D extends inwardly and has a tip end reaching the front plate part 12B of the base plate 12, and a front grip part 14D that bends from the tip part of the front grip part 14D and extends rearward and is attached to the front plate part 12B. and a mounting bar 14E.
そして、外側把持部14Cは、シートベース11の左右方向の外側に位置して前後方向に延びている。外側把持部14Cは、原動機カバー9の上面部9Eに沿うように、前側に向けて下側に傾斜している。例えば、手袋を装着した状態でも、当該外側把持部14Cと上面部9Eとの間に手を入れることができるように、外側把持部14Cは、上面部9Eとの間に所定の隙間を有している。
The outer grip portion 14C is located on the outer side of the seat base 11 in the left-right direction and extends in the front-rear direction. The outer grip portion 14C is inclined downward toward the front side along the upper surface portion 9E of the prime mover cover 9. For example, the outer grip part 14C has a predetermined gap between it and the upper surface part 9E so that even when wearing gloves, a hand can be inserted between the outer grip part 14C and the upper surface part 9E. ing.
また、外側把持部14Cは、運転席10の座部10Bに腰掛けるとき、立ち上がるときに邪魔にならないように、座部10Bの座面(上面)よりも低い位置に配置されている。さらに、図11に示すように、外側把持部14Cは、前側に向けて左右方向の内側に傾斜している。従って、外側把持部14Cは、オペレータの脚に近い前側位置の張出し寸法を小さく抑えることができる。これにより、オペレータが運転席10に座った状態で脚を原動機カバー9に近い位置に置いた場合でも、脚と外側把持部14Cが干渉しないようになっている。
Further, the outer grip portion 14C is arranged at a position lower than the seat surface (upper surface) of the seat portion 10B so as not to get in the way when sitting on the seat portion 10B of the driver's seat 10 and standing up. Further, as shown in FIG. 11, the outer grip portion 14C is inclined inward in the left-right direction toward the front side. Therefore, the outer grip portion 14C can suppress the overhang dimension of the front side position near the operator's legs to a small size. Thereby, even when the operator sits in the driver's seat 10 and places his/her legs close to the prime mover cover 9, the legs and the outer grip portion 14C do not interfere with each other.
前側把持部14Dは、シートベース11の前側に位置して左右方向に延びている。また、図7、図12に示すように、前側把持部14Dは、左右方向の外側から内側に向けて下向きに傾斜することにより、スライド機構10Aによって前側に移動した運転席10(スライド機構10Aの移動部、座部10B)よりも低い位置に配置されている。これにより、運転席10を、図3に示す中間位置、図4に示す最前位置に移動させた場合でも、運転席10が前側把持部14Dに干渉するのを回避することができる。さらに、左右の取付バー14E(前側把持部14Dの先端)は、スライド機構10Aのレバー部10A1を間に挟み、左右方向に大きく離れている。従って、左右の取付バー14Eは、運転席10を、図3に示す中間位置、図4に示す最前位置に移動させた場合でも、スライド機構10Aのレバー部10A1との干渉を防止することができる。
The front grip portion 14D is located on the front side of the seat base 11 and extends in the left-right direction. In addition, as shown in FIGS. 7 and 12, the front grip portion 14D is tilted downward from the outside to the inside in the left-right direction, so that the driver's seat 10 (of the slide mechanism 10A) is moved forward by the slide mechanism 10A. The moving part and the seat part 10B) are arranged at a lower position. Thereby, even when the driver's seat 10 is moved to the intermediate position shown in FIG. 3 or the frontmost position shown in FIG. 4, it is possible to avoid the driver's seat 10 from interfering with the front grip part 14D. Further, the left and right mounting bars 14E (tips of the front gripping portions 14D) are widely separated in the left-right direction with the lever portion 10A1 of the slide mechanism 10A sandwiched between them. Therefore, the left and right mounting bars 14E can prevent interference with the lever portion 10A1 of the slide mechanism 10A even when the driver's seat 10 is moved to the intermediate position shown in FIG. 3 or to the foremost position shown in FIG. .
シートベース11には、追加部品を取付けるための取付部が設けられている。具体的には、シートベース11には、後述のシートベルト19,20を取付けるためのシートベルト取付部15,16、グリスガン21を取付けるためのグリスガン取付部17、カップホルダ22を取付けるためのカップホルダ取付部18等が設けられている。
The seat base 11 is provided with a mounting portion for mounting additional parts. Specifically, the seat base 11 includes seat belt attachment parts 15 and 16 for attaching seat belts 19 and 20 (described later), a grease gun attachment part 17 for attaching a grease gun 21, and a cup holder for attaching a cup holder 22. A mounting portion 18 and the like are provided.
一対のシートベルト取付部15,16は、ベース板12の後板部12Cの左右両側に設けられている。シートベルト取付部15,16は、L字状に屈曲した板体からなり、下端縁が後板部12Cに固着されている。また、シートベルト取付部15,16のうち前後方向に延びた取付面には、ねじ孔15A,16Aが設けられている。左側のシートベルト取付部15には、左側のシートベルト19の基部19Aに挿通させたボルトをねじ孔15Aに螺着することで、基部19Aが取付けられている。一方、右側のシートベルト取付部16には、右側のシートベルト20の基部20Aに挿通させたボルトをねじ孔16Aに螺着することで、基部20Aが取付けられている。
A pair of seat belt attachment parts 15 and 16 are provided on both left and right sides of the rear plate part 12C of the base plate 12. The seat belt attachment parts 15 and 16 are made of plates bent in an L-shape, and their lower edges are fixed to the rear plate part 12C. Moreover, screw holes 15A, 16A are provided in the mounting surfaces of the seat belt mounting parts 15, 16 that extend in the front-rear direction. A base 19A is attached to the left seat belt attachment portion 15 by screwing a bolt inserted through the base 19A of the left seat belt 19 into a screw hole 15A. On the other hand, a base portion 20A is attached to the right seat belt attachment portion 16 by screwing a bolt inserted through the base portion 20A of the right seat belt 20 into a screw hole 16A.
ここで、欧州の規格では、超小型の油圧ショベルにもシートベルトを設置する必要がある。この場合、シートベルトは、運転席以外、例えば原動機カバーに取付けられるのが一般的である。この上で、欧州の規格では、シートベルトの取付強度は、シートベルトを15000Nの力で引っ張っても耐えることができる強度が必要になる。
Here, according to European standards, it is necessary to install seat belts even on ultra-small hydraulic excavators. In this case, the seat belt is generally attached to a location other than the driver's seat, for example, to the motor cover. Furthermore, according to European standards, the mounting strength of the seat belt must be strong enough to withstand even when the seat belt is pulled with a force of 15,000N.
しかし、本実施形態の原動機カバー9は、薄い鋼板等を用いて形成されているために、シートベルト19,20を原動機カバー9に直接ボルト止めする構成では、一箇所のボルト止め部分に応力が集中して15000Nの力に耐えることができない虞がある。
However, since the prime mover cover 9 of this embodiment is formed using a thin steel plate or the like, in the configuration in which the seat belts 19 and 20 are bolted directly to the prime mover cover 9, stress is generated at one bolted portion. There is a possibility that it will not be able to withstand a concentrated force of 15,000N.
これに対し、シートベルト取付部15,16は、強度を備えたシートベース11に取付けられ、このシートベース11を介して原動機カバー9に取付けられている。従って、シートベルト19,20が引っ張られてシートベルト取付部15,16に作用する負荷は、シートベース11を介して広範囲に分散させた状態で原動機カバー9に伝えることができる。
On the other hand, the seat belt attachment parts 15 and 16 are attached to a strong seat base 11, and are attached to the prime mover cover 9 via this seat base 11. Therefore, the load that is applied to the seat belt attachment parts 15 and 16 when the seat belts 19 and 20 are pulled can be transmitted to the prime mover cover 9 via the seat base 11 in a widely dispersed state.
グリスガン取付部17は、ベース板12の後部に設けられている。グリスガン取付部17は、水平方向に延びた取付面に複数個、例えば、2個のねじ孔17Aが左右方向に間隔をもって設けられている。グリスガン取付部17には、グリスガンホルダ21Aに挿通させたボルトをねじ孔17Aに螺着することで、グリスガンホルダ21A(グリスガン21)が取付けられている。
The grease gun mounting portion 17 is provided at the rear of the base plate 12. The grease gun mounting portion 17 has a plurality of, for example, two, screw holes 17A provided at intervals in the left-right direction on a mounting surface extending in the horizontal direction. A grease gun holder 21A (grease gun 21) is attached to the grease gun attachment portion 17 by screwing a bolt inserted through the grease gun holder 21A into a screw hole 17A.
カップホルダ取付部18は、右側の把手14に設けられている。カップホルダ取付部18は、外向きバー14Bの先端側に固着され、上側に延びている。図9に示すように、カップホルダ取付部18の上側には、カップホルダ22を取付けるためのボルト(図示せず)が螺着されるねじ孔18Aが設けられている。
The cup holder attachment part 18 is provided on the right handle 14. The cup holder attachment portion 18 is fixed to the distal end side of the outward bar 14B and extends upward. As shown in FIG. 9, a screw hole 18A is provided on the upper side of the cup holder attachment portion 18, into which a bolt (not shown) for attaching the cup holder 22 is screwed.
左側のシートベルト19は、左側のシートベルト取付部15に取付けられている。左側のシートベルト19は、基部19Aに挿通されたボルトがシートベルト取付部15のねじ孔15Aに螺着されることにより、シートベルト取付部15に取付けられている。また、右側のシートベルト20は、右側のシートベルト取付部16に取付けられている。右側のシートベルト20は、基部20Aに挿通されたボルトがシートベルト取付部16のねじ孔16Aに螺着されることにより、シートベルト取付部16に取付けられている。左側のシートベルト19と右側のシートベルト20とは、運転席10に座ったオペレータの腹回りで連結されることにより、オペレータを運転席10に固定することができる。
The left seat belt 19 is attached to the left seat belt attachment part 15. The left seat belt 19 is attached to the seat belt attachment portion 15 by screwing a bolt inserted through the base portion 19A into a screw hole 15A of the seat belt attachment portion 15. Further, the right seat belt 20 is attached to the right seat belt attachment portion 16. The right seat belt 20 is attached to the seat belt attachment portion 16 by screwing a bolt inserted through the base portion 20A into a screw hole 16A of the seat belt attachment portion 16. The left seat belt 19 and the right seat belt 20 are connected around the abdomen of the operator sitting in the driver's seat 10, so that the operator can be fixed to the driver's seat 10.
グリスガン21は、シートベース11の後側に設けられている。グリスガン21は、油圧ショベル1の給油箇所に潤滑剤としてのグリスを充填するための工具である。グリスガン21は、グリスガンホルダ21Aを備えている。グリスガンホルダ21Aは、グリスガン取付部17上に載置される。この状態で、グリスガンホルダ21Aは、挿通されたボルトをねじ孔17Aに螺着することにより、グリスガン取付部17に取付けられている。
The grease gun 21 is provided on the rear side of the seat base 11. The grease gun 21 is a tool for filling the oil supply portion of the hydraulic excavator 1 with grease as a lubricant. The grease gun 21 includes a grease gun holder 21A. The grease gun holder 21A is placed on the grease gun mounting portion 17. In this state, the grease gun holder 21A is attached to the grease gun attachment portion 17 by screwing the inserted bolt into the screw hole 17A.
カップホルダ22は、シートベース11の右側の把手14に設けられている。カップホルダ22は、有底の円筒体からなり、その内部には、飲料の容器を収めることができる。カップホルダ22は、当該カップホルダ22の側部に挿通されたボルトをカップホルダ取付部18のねじ孔18Aに螺着することにより、カップホルダ取付部18に取付けられている。
The cup holder 22 is provided on the right handle 14 of the seat base 11. The cup holder 22 is made of a cylindrical body with a bottom, and a beverage container can be housed inside the cup holder 22 . The cup holder 22 is attached to the cup holder attachment part 18 by screwing a bolt inserted through the side of the cup holder 22 into the screw hole 18A of the cup holder attachment part 18.
フロア23は、原動機カバー9から前側に延びて設けられている。レバースタンド24は、フロア23の前部に立設されている。レバースタンド24の上部には、走行用の操作レバー25と作業用の操作レバー26とが設けられている。
The floor 23 is provided to extend from the prime mover cover 9 to the front side. The lever stand 24 is erected at the front of the floor 23. An operating lever 25 for traveling and an operating lever 26 for working are provided on the upper part of the lever stand 24.
図1に示すように、ロールバー27は、旋回フレーム5のカウンタウエイト5Cの後側に取付けられている。ロールバー27は、運転席10に座ったオペレータよりも高い位置まで延びた逆U字状の強度部材によって構成されている。これにより、ロールバー27は、構造物が落下してきたり、油圧ショベル1が上下反転したりしたときに、オペレータを保護することができる。また、図2に示すように、ロールバー27は、原動機カバー9を開くときには、邪魔にならないように水平方向に回動して退避させることができる。
As shown in FIG. 1, the roll bar 27 is attached to the rear side of the counterweight 5C of the swing frame 5. The roll bar 27 is constituted by an inverted U-shaped strength member that extends to a higher position than the operator sitting in the driver's seat 10. Thereby, the roll bar 27 can protect the operator when a structure falls or when the hydraulic excavator 1 is turned upside down. Further, as shown in FIG. 2, when the prime mover cover 9 is opened, the roll bar 27 can be rotated horizontally and retracted so as not to get in the way.
本実施形態による油圧ショベル1は、上述の如き構成を有するもので、次に、その動作について説明する。
The hydraulic excavator 1 according to this embodiment has the configuration described above, and its operation will be described next.
オペレータは、フロア23上に搭乗し、運転席10に着座する。このときに、オペレータは、スライド機構10Aのレバー部10A1を操作することにより、座部10Bの位置を好みに応じて前後に移動させることができる。運転席10を好みの位置に調整したら、オペレータは、シートベルト19とシートベルト20を連結する。
The operator boards the floor 23 and sits in the driver's seat 10. At this time, the operator can move the position of the seat part 10B back and forth as desired by operating the lever part 10A1 of the slide mechanism 10A. After adjusting the driver's seat 10 to a desired position, the operator connects the seat belt 19 and the seat belt 20.
運転席10に着座したオペレータは、レバースタンド24の走行用の操作レバー25を操作することにより、下部走行体2を走行させることができる。一方、オペレータは、作業用の操作レバー26を操作することにより、上部旋回体3を旋回させたり、作業装置4を回動させたりして土砂の掘削作業等を行うことができる。
An operator seated in the driver's seat 10 can cause the lower traveling body 2 to travel by operating the operating lever 25 for traveling on the lever stand 24. On the other hand, the operator can perform earth and sand excavation work by rotating the upper revolving body 3 or rotating the working device 4 by operating the operation lever 26 for work.
また、エンジン7等のメンテナンスを行う場合には、ロールバー27を水平方向に移動させた後に、開閉レバー9Gを操作してロックを解除し、把手14を掴んで原動機カバー9を持ち上げる。このときに、把手14は、原動機カバー9の回動支点となる連結部材9Fから離れているから、小さな力で簡単に原動機カバー9を持ち上げて開くことができる。原動機カバー9を開いた状態では、エンジン7等のメンテナンスを行うことができる。エンジン7等のメンテナンスが終了したら、原動機カバー9を閉じて、ロールバー27を元に戻す。
In addition, when performing maintenance on the engine 7, etc., after moving the roll bar 27 in the horizontal direction, operate the opening/closing lever 9G to release the lock, grasp the handle 14, and lift the prime mover cover 9. At this time, since the handle 14 is separated from the connecting member 9F, which serves as a pivot point for the motor cover 9, the motor cover 9 can be easily lifted and opened with a small force. With the prime mover cover 9 open, maintenance of the engine 7 and the like can be performed. After the maintenance of the engine 7 and the like is completed, the prime mover cover 9 is closed and the roll bar 27 is returned to its original position.
かくして、本実施形態によれば、エンジン7を開閉可能に覆う原動機カバー9の上面部9Eと運転席10との間に設けられ、運転席10を原動機カバー9の上側に固定するシートベース11を備えている。また、シートベース11のベース板12は、運転席10に取付けられる運転席固定部としての4個のねじ孔12Fと、原動機カバー9に取付けられる原動機カバー固定部としての6個のボルト挿通孔12D,12Eと、を有している。この上で、ベース板12のボルト挿通孔12D,12Eは、ねじ孔12Fよりも広範囲に配置されている。換言すると、原動機カバー固定部としての6個のボルト挿通孔12D,12Eを頂点とする多角形の面の面積は、運転席固定部としての4個のねじ孔12Fを頂点とする多角形の面の面積よりも大きく設定されている。この場合、シートベース11は、運転席10を取付ける前に、原動機カバー9に取付けることができる。即ち、運転席10を取付けた状態では、スパナ、ソケットレンチ等のねじ締め工具が届かない位置、具体的には、シートベルト取付部15,16の内側にも、原動機カバー9に対するシートベース11の取付位置(ボルト止め位置)を設定することができる。
Thus, according to the present embodiment, the seat base 11 is provided between the upper surface portion 9E of the prime mover cover 9 that covers the engine 7 in an openable/closable manner and the driver's seat 10, and that fixes the driver's seat 10 to the upper side of the prime mover cover 9. We are prepared. The base plate 12 of the seat base 11 also has four screw holes 12F as a driver's seat fixing part to be attached to the driver's seat 10, and six bolt insertion holes 12D as a prime mover cover fixing part to be attached to the prime mover cover 9. , 12E. Furthermore, the bolt insertion holes 12D and 12E of the base plate 12 are arranged over a wider range than the screw holes 12F. In other words, the area of the polygonal surface whose vertices are the six bolt insertion holes 12D and 12E as the prime mover cover fixing section is equal to the area of the polygonal surface whose vertices are the four screw holes 12F as the driver's seat fixing section. is set larger than the area of In this case, the seat base 11 can be attached to the prime mover cover 9 before the driver's seat 10 is attached. That is, when the driver's seat 10 is installed, there are places where the seat base 11 relative to the prime mover cover 9 cannot be reached by screw tightening tools such as spanners and socket wrenches, specifically, inside the seat belt attachment parts 15 and 16. The mounting position (bolt position) can be set.
従って、シートベース11の取付位置を原動機カバー9の広範囲に亘って複数個所設けることができる。これにより、運転席10からシートベース11に作用した負荷は、シートベース11によって複数個所の取付位置に分散することができる。この結果、原動機カバー9の一部に負荷が集中することを防止できるから、原動機カバー9の強度を低く抑えた状態でも、原動機カバー9の変形を抑えることができる。
Therefore, the seat base 11 can be mounted at a plurality of locations over a wide range of the motor cover 9. Thereby, the load acting on the seat base 11 from the driver's seat 10 can be distributed to a plurality of mounting positions by the seat base 11. As a result, it is possible to prevent the load from being concentrated on a part of the prime mover cover 9, so that deformation of the prime mover cover 9 can be suppressed even when the strength of the prime mover cover 9 is kept low.
また、本実施形態では、運転席10は、着座位置を前後方向に移動させるスライド機構10Aを備えているから、運転席10の重量がより大きくなり、運転席10の取付部分に加わる負荷がさらに大きくなる。この場合でも、原動機カバー9と運転席10との間にシートベース11を介在させた取付構造では、原動機カバー9に加わる負荷を分散して原動機カバー9の変形を防止することができる。
Furthermore, in this embodiment, the driver's seat 10 is provided with the slide mechanism 10A that moves the seating position in the front-back direction, so the weight of the driver's seat 10 becomes larger, and the load applied to the mounting portion of the driver's seat 10 is further increased. growing. Even in this case, with the mounting structure in which the seat base 11 is interposed between the prime mover cover 9 and the driver's seat 10, the load applied to the prime mover cover 9 can be distributed and deformation of the prime mover cover 9 can be prevented.
しかも、原動機カバー9と運転席10との間にシートベース11を配置した構成では、運転席10の仕様が異なる場合でも、原動機カバー9に対するシートベース11の取付位置を設定することができる。この場合、原動機カバー9の上面部9Eに対するシートベース11の取付位置は、変形し易い上面部9Eの中央部から離れた位置、つまり原動機カバー9の上面部9Eに負荷が加わった際の支点(変形の起点)となる原動機カバーの曲げ加工部分の近傍の位置に設定できる。具体的には、原動機カバー9の上面部9Eのうち、前面部9A、後面部9B、左面部9C、右面部9Dとの間の曲げ加工部分(稜線部分)の近くに負荷が加わった場合には、作用点と支点の距離が短くなり、同じ負荷に対する曲げモーメントが小さくなる。これにより、原動機カバー9は、曲げ加工部分の近くにねじ孔9J,9Kを設けたことにより、変形が生じ難く、負荷に対する耐久性をより向上することができる。
Moreover, in the configuration in which the seat base 11 is arranged between the prime mover cover 9 and the driver's seat 10, the mounting position of the seat base 11 with respect to the prime mover cover 9 can be set even if the specifications of the driver's seat 10 are different. In this case, the mounting position of the seat base 11 on the top surface 9E of the prime mover cover 9 is a position away from the center of the top surface 9E, which is easily deformed, that is, the fulcrum point when a load is applied to the top surface 9E of the prime mover cover 9. It can be set at a position near the bent part of the motor cover, which is the starting point of deformation. Specifically, when a load is applied to the upper part 9E of the prime mover cover 9 near the bending part (ridge line part) between the front part 9A, the rear part 9B, the left part 9C, and the right part 9D. , the distance between the point of action and the fulcrum becomes shorter, and the bending moment for the same load becomes smaller. Thereby, since the screw holes 9J and 9K are provided near the bent portions, the prime mover cover 9 is less likely to be deformed, and its durability against loads can be further improved.
シートベース11には、原動機カバー9を開閉操作するための把手14が設けられている。これにより、把手14を掴むことにより、原動機カバー9を容易に開閉することができる。また、走行中に揺れた場合でも、把手14を掴むことによって身体(姿勢)を安定させることができる。
The seat base 11 is provided with a handle 14 for opening and closing the prime mover cover 9. Thereby, by grasping the handle 14, the prime mover cover 9 can be easily opened and closed. Furthermore, even if the vehicle sways while traveling, the body (posture) can be stabilized by grasping the handle 14.
さらに、シートベース11に把手14を設けた構成では、原動機カバーに把手を直接的に設けた構成と比較し、把手14を掴んで原動機カバー9を開閉操作するときに原動機カバー9に作用する負荷が分散されるから、原動機カバー9の変形を防止することができる。
Furthermore, in the configuration in which the handle 14 is provided on the seat base 11, compared to the configuration in which the handle is directly provided on the prime mover cover, the load that acts on the prime mover cover 9 when the handle 14 is grasped and the prime mover cover 9 is opened/closed is increased. Since the components are dispersed, deformation of the motor cover 9 can be prevented.
原動機カバー9は、後側を支点として前側が上下方向に開閉可能な開閉式カバーとして形成されている。この上で、把手14は、シートベース11の左右方向の外側に位置して前後方向に延びた外側把持部14Cと、シートベース11の前側に位置して左右方向に延びた前側把持部14Dと、を備えている。これにより、把手14は、油圧ショベル1の左右のどちらからでも掴むことができる。また、把手14は、前側からも掴むことができる。
The prime mover cover 9 is formed as an openable/closable cover whose front side can be opened and closed in the vertical direction with the rear side as a fulcrum. In addition, the handle 14 includes an outer grip part 14C located on the outside of the seat base 11 in the left-right direction and extending in the front-rear direction, and a front grip part 14D located in the front side of the seat base 11 and extending in the left-right direction. , is equipped with. Thereby, the handle 14 can be grasped from either the left or right side of the hydraulic excavator 1. Moreover, the handle 14 can also be grasped from the front side.
把手14は、原動機カバー9の前面部9Aの前面9A1よりも後側に配置されている。従って、把手14は、運転席10に座ったオペレータの脚(ふくらはぎ等)が不用意に干渉するのを防止でき、作業性を向上することができる。
The handle 14 is arranged on the rear side of the front surface 9A1 of the front surface portion 9A of the prime mover cover 9. Therefore, the handle 14 can prevent the legs (calf, etc.) of the operator sitting in the driver's seat 10 from inadvertently interfering with the handle 14, thereby improving work efficiency.
さらに、運転席10は、着座位置を前後方向に移動可能なスライド機構10Aを備えている。この上で、把手14の前側把持部14Dは、左右方向の外側から内側に向けて下向きに傾斜することにより、スライド機構10Aによって前側に移動した運転席10(スライド機構10Aの移動部、座部10B)よりも低い位置に配置されている。これにより、把手14の前側把持部14Dは、スライド機構10Aによって運転席10を前側に移動させた場合でも、運転席10(スライド機構10Aの移動部、座部10B)が干渉するのを回避することができる。
Further, the driver's seat 10 includes a slide mechanism 10A that allows the seating position to be moved in the front and rear directions. On top of this, the front grip part 14D of the handle 14 is tilted downward from the outside to the inside in the left-right direction, so that the driver's seat 10 (the moving part of the slide mechanism 10A, the seat part) that has been moved forward by the slide mechanism 10A 10B). Thereby, the front grip part 14D of the handle 14 avoids interference with the driver's seat 10 (the moving part of the slide mechanism 10A, the seat part 10B) even when the driver's seat 10 is moved forward by the slide mechanism 10A. be able to.
一方、シートベース11には、シートベルト取付部15,16、グリスガン取付部17、カップホルダ取付部18が設けられている。これにより、シートベース11には、シートベルト取付部15,16を利用してシートベルト19,20を取付けることができる。グリスガン取付部17を利用してグリスガン21を取付けることができる。カップホルダ取付部18を利用してカップホルダ22を取付けることができる。
On the other hand, the seat base 11 is provided with seat belt attachment parts 15 and 16, a grease gun attachment part 17, and a cup holder attachment part 18. Thereby, the seat belts 19 and 20 can be attached to the seat base 11 using the seat belt attaching parts 15 and 16. The grease gun 21 can be attached using the grease gun attachment part 17. The cup holder 22 can be attached using the cup holder attachment part 18.
なお、実施形態では、6本のボルト13を用いて原動機カバー9の上面部9Eにシートベース11を取付け、4本のボルトを用いてシートベース11に運転席10のスライド機構10Aを取付けた場合を例に挙げて説明した。しかし、本発明はこれに限らず、2本~5本または7本以上のボルト13を用いて原動機カバー9の上面部9Eにシートベース11を取付け、2本、3本または5本以上のボルトを用いてシートベース11に運転席10のスライド機構10Aを取付ける構成としてもよい。
In the embodiment, the seat base 11 is attached to the upper surface part 9E of the prime mover cover 9 using six bolts 13, and the slide mechanism 10A of the driver's seat 10 is attached to the seat base 11 using four bolts. was explained using an example. However, the present invention is not limited to this, and the seat base 11 is attached to the upper surface portion 9E of the prime mover cover 9 using 2 to 5 or 7 or more bolts 13, The slide mechanism 10A of the driver's seat 10 may be attached to the seat base 11 using the following.
また、実施形態では、原動機カバー9の上面部9Eに対するシートベース11の取付位置を、前面部9A、後面部9B、左面部9C、右面部9Dに近いシートベルト取付部15,16の内側に設定した場合を例示している。しかし、本発明はこれに限らず、例えば、原動機カバー9の上面部9Eに対するシートベース11の取付位置を、運転席10の下側に設定してもよい。
Further, in the embodiment, the mounting position of the seat base 11 with respect to the upper surface portion 9E of the prime mover cover 9 is set to the inside of the seat belt attachment portions 15 and 16 near the front surface portion 9A, rear surface portion 9B, left surface portion 9C, and right surface portion 9D. This example shows the case where However, the present invention is not limited thereto, and for example, the mounting position of the seat base 11 relative to the upper surface portion 9E of the prime mover cover 9 may be set below the driver's seat 10.
さらに、実施形態では、原動機カバー9の後部を旋回フレーム5のカウンタウエイト5C上に回動可能に取付けた場合を例示している。しかし、本発明はこれに限るものではなく、例えば、原動機カバー9の前部、左部または右部を、車体に対して回動可能に取付ける構成としてもよい。
Further, in the embodiment, a case is illustrated in which the rear part of the prime mover cover 9 is rotatably mounted on the counterweight 5C of the swing frame 5. However, the present invention is not limited to this, and for example, the front, left, or right portion of the motor cover 9 may be rotatably attached to the vehicle body.
1 油圧ショベル
2 下部走行体
3 上部旋回体
5 旋回フレーム
7 エンジン(原動機)
9 原動機カバー
9A 前面部
9A1 前面
9E 上面部
9F 連結部材(支点)
10 運転席
10A スライド機構
11 シートベース
12 ベース板
12D,12E ボルト挿通孔(原動機カバー固定部)
12F ねじ孔(運転席固定部)
14 把手
14C 外側把持部
14D 前側把持部
15,16 シートベルト取付部(取付部)
17 グリスガン取付部(取付部)
18 カップホルダ取付部(取付部)
19,20 シートベルト(追加部品)
21 グリスガン(追加部品)
22 カップホルダ(追加部品) 1Hydraulic excavator 2 Lower traveling body 3 Upper rotating body 5 Swinging frame 7 Engine (prime mover)
9Prime mover cover 9A Front part 9A1 Front part 9E Top part 9F Connection member (fulcrum)
10 Driver'sseat 10A Slide mechanism 11 Seat base 12 Base plate 12D, 12E Bolt insertion hole (motor cover fixing part)
12F screw hole (driver seat fixing part)
14Handle 14C Outer grip part 14D Front grip part 15, 16 Seat belt attachment part (attachment part)
17 Grease gun mounting part (mounting part)
18 Cup holder mounting part (mounting part)
19,20 Seat belt (additional parts)
21 Grease gun (additional parts)
22 Cup holder (additional parts)
2 下部走行体
3 上部旋回体
5 旋回フレーム
7 エンジン(原動機)
9 原動機カバー
9A 前面部
9A1 前面
9E 上面部
9F 連結部材(支点)
10 運転席
10A スライド機構
11 シートベース
12 ベース板
12D,12E ボルト挿通孔(原動機カバー固定部)
12F ねじ孔(運転席固定部)
14 把手
14C 外側把持部
14D 前側把持部
15,16 シートベルト取付部(取付部)
17 グリスガン取付部(取付部)
18 カップホルダ取付部(取付部)
19,20 シートベルト(追加部品)
21 グリスガン(追加部品)
22 カップホルダ(追加部品) 1
9
10 Driver's
12F screw hole (driver seat fixing part)
14
17 Grease gun mounting part (mounting part)
18 Cup holder mounting part (mounting part)
19,20 Seat belt (additional parts)
21 Grease gun (additional parts)
22 Cup holder (additional parts)
Claims (6)
- 自走可能な下部走行体と、
前記下部走行体上に旋回可能に設けられた上部旋回体と、
を備え、
前記上部旋回体は、
支持構造体をなす旋回フレームと、
前記旋回フレームの後側に設けられた原動機と、
前記原動機を開閉可能に覆う原動機カバーと、
前記原動機カバーの上側に設けられた運転席と、
を備えた建設機械において、
前記原動機カバーの上面部と前記運転席との間に設けられ、前記運転席を前記原動機カバーの上側に固定するシートベースを備え、
前記シートベースは、
前記運転席に取付けられる運転席固定部と、
前記原動機カバーに取付けられる原動機カバー固定部と、
を有し、
前記シートベースの前記原動機カバー固定部は、前記運転席固定部よりも広範囲に配置されていることを特徴とする建設機械。 A self-propelled lower body,
an upper rotating body rotatably provided on the lower traveling body;
Equipped with
The upper revolving body is
a rotating frame forming a support structure;
a prime mover provided on the rear side of the swing frame;
a prime mover cover that covers the prime mover in an openable and closable manner;
a driver's seat provided above the prime mover cover;
In construction machinery equipped with
a seat base provided between the upper surface of the prime mover cover and the driver's seat, and fixing the driver's seat to the upper side of the prime mover cover;
The seat base is
a driver's seat fixing part attached to the driver's seat;
a prime mover cover fixing portion attached to the prime mover cover;
has
The construction machine is characterized in that the prime mover cover fixing part of the seat base is arranged over a wider area than the driver's seat fixing part. - 請求項1に記載の建設機械において、
前記シートベースには、前記原動機カバーを開閉操作するための把手が設けられていることを特徴とする建設機械。 The construction machine according to claim 1,
A construction machine characterized in that the seat base is provided with a handle for opening and closing the prime mover cover. - 請求項2に記載の建設機械において、
前記原動機カバーは、後側を支点として前側が上下方向に開閉可能な開閉式カバーとして形成され、
前記把手は、前記シートベースの左右方向の外側に位置して前後方向に延びた外側把持部と、前記シートベースの前側に位置して左右方向に延びた前側把持部と、を備えていることを特徴とする建設機械。 The construction machine according to claim 2,
The prime mover cover is formed as an openable cover whose front side can be opened and closed in the vertical direction with the rear side as a fulcrum,
The handle includes an outer grip portion located on the outer side of the seat base in the left-right direction and extending in the front-rear direction, and a front grip portion located on the front side of the seat base and extended in the left-right direction. Construction machinery featuring: - 請求項3に記載の建設機械において、
前記把手は、前記原動機カバーの前面よりも後側に配置されていることを特徴とする建設機械。 The construction machine according to claim 3,
The construction machine is characterized in that the handle is disposed on the rear side of the front surface of the prime mover cover. - 請求項3に記載の建設機械において、
前記運転席は、着座位置を前後方向に移動可能なスライド機構を備え、
前記把手の前記前側把持部は、左右方向の外側から内側に向けて下向きに傾斜することにより前記スライド機構によって前側に移動した前記運転席よりも低い位置に配置されていることを特徴とする建設機械。 The construction machine according to claim 3,
The driver's seat includes a slide mechanism that allows the seating position to be moved in the front and back direction,
The front gripping part of the handle is arranged at a lower position than the driver's seat which has been moved forward by the slide mechanism by tilting downward from the outside to the inside in the left-right direction. machine. - 請求項1に記載の建設機械において、
前記シートベースには、追加部品を取付けるための取付部が設けられていることを特徴とする建設機械。 The construction machine according to claim 1,
A construction machine, wherein the seat base is provided with a mounting portion for mounting additional parts.
Priority Applications (2)
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CN202380014310.6A CN118202120A (en) | 2022-03-25 | 2023-02-23 | Engineering machinery |
KR1020247013071A KR20240064713A (en) | 2022-03-25 | 2023-02-23 | construction machinery |
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JP2022049888 | 2022-03-25 | ||
JP2022-049888 | 2022-03-25 |
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PCT/JP2023/006607 WO2023181775A1 (en) | 2022-03-25 | 2023-02-23 | Construction machine |
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KR (1) | KR20240064713A (en) |
CN (1) | CN118202120A (en) |
WO (1) | WO2023181775A1 (en) |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002061222A (en) * | 2000-08-24 | 2002-02-28 | Hitachi Constr Mach Co Ltd | Slewing type construction machine |
JP2006077496A (en) * | 2004-09-10 | 2006-03-23 | Shin Caterpillar Mitsubishi Ltd | Parking lever arranging structure in work vehicle |
JP2008007965A (en) * | 2006-06-27 | 2008-01-17 | Hitachi Constr Mach Co Ltd | Construction machine |
JP2015086684A (en) * | 2013-09-24 | 2015-05-07 | 株式会社神戸製鋼所 | Operator seat structure of construction machine |
JP2015137535A (en) * | 2014-01-24 | 2015-07-30 | 日立建機株式会社 | Construction machine |
JP2015221591A (en) * | 2014-05-22 | 2015-12-10 | 日立建機株式会社 | Construction machine |
JP2019056219A (en) | 2017-09-20 | 2019-04-11 | ヤンマー株式会社 | Working vehicle |
-
2023
- 2023-02-23 KR KR1020247013071A patent/KR20240064713A/en unknown
- 2023-02-23 WO PCT/JP2023/006607 patent/WO2023181775A1/en unknown
- 2023-02-23 CN CN202380014310.6A patent/CN118202120A/en active Pending
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002061222A (en) * | 2000-08-24 | 2002-02-28 | Hitachi Constr Mach Co Ltd | Slewing type construction machine |
JP2006077496A (en) * | 2004-09-10 | 2006-03-23 | Shin Caterpillar Mitsubishi Ltd | Parking lever arranging structure in work vehicle |
JP2008007965A (en) * | 2006-06-27 | 2008-01-17 | Hitachi Constr Mach Co Ltd | Construction machine |
JP2015086684A (en) * | 2013-09-24 | 2015-05-07 | 株式会社神戸製鋼所 | Operator seat structure of construction machine |
JP2015137535A (en) * | 2014-01-24 | 2015-07-30 | 日立建機株式会社 | Construction machine |
JP2015221591A (en) * | 2014-05-22 | 2015-12-10 | 日立建機株式会社 | Construction machine |
JP2019056219A (en) | 2017-09-20 | 2019-04-11 | ヤンマー株式会社 | Working vehicle |
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KR20240064713A (en) | 2024-05-13 |
CN118202120A (en) | 2024-06-14 |
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